I haven't been able to reproduce either one. It seems obvious that some errant entry in the user autocorrect dictionary is at fault, especially the latest: change "it" to "I.T.". But that would seem to be obviously fixable.

"Design is not just what it looks like and feels like. Design is how it works."
Steve Jobs

I suspect this an innumeracy problem. Something like half a billion devices are running iOS 11, and a couple hundred users with a bug (the claim for the I.T. bug) is a tiny percentage. Still, Apple continues to fix those bugs.

"Design is not just what it looks like and feels like. Design is how it works."
Steve Jobs